mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 11:48:23 -05:00
457 lines
15 KiB
C
Executable File
457 lines
15 KiB
C
Executable File
/*
|
|
* Core Audio Format demuxer
|
|
* Copyright (c) 2007 Justin Ruggles
|
|
* Copyright (c) 2009 Peter Ross
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Core Audio Format demuxer
|
|
*/
|
|
|
|
#include <inttypes.h>
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "isom.h"
|
|
#include "mov_chan.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/intfloat.h"
|
|
#include "libavutil/dict.h"
|
|
#include "caf.h"
|
|
|
|
typedef struct CafContext {
|
|
int bytes_per_packet; ///< bytes in a packet, or 0 if variable
|
|
int frames_per_packet; ///< frames in a packet, or 0 if variable
|
|
int64_t num_bytes; ///< total number of bytes in stream
|
|
|
|
int64_t packet_cnt; ///< packet counter
|
|
int64_t frame_cnt; ///< frame counter
|
|
|
|
int64_t data_start; ///< data start position, in bytes
|
|
int64_t data_size; ///< raw data size, in bytes
|
|
} CafContext;
|
|
|
|
static int probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RB32(p->buf) == MKBETAG('c','a','f','f') && AV_RB16(&p->buf[4]) == 1)
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
/** Read audio description chunk */
|
|
static int read_desc_chunk(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
CafContext *caf = s->priv_data;
|
|
AVStream *st;
|
|
int flags;
|
|
|
|
/* new audio stream */
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* parse format description */
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->sample_rate = av_int2double(avio_rb64(pb));
|
|
st->codecpar->codec_tag = avio_rl32(pb);
|
|
flags = avio_rb32(pb);
|
|
caf->bytes_per_packet = avio_rb32(pb);
|
|
st->codecpar->block_align = caf->bytes_per_packet;
|
|
caf->frames_per_packet = avio_rb32(pb);
|
|
st->codecpar->channels = avio_rb32(pb);
|
|
st->codecpar->bits_per_coded_sample = avio_rb32(pb);
|
|
|
|
/* calculate bit rate for constant size packets */
|
|
if (caf->frames_per_packet > 0 && caf->bytes_per_packet > 0) {
|
|
st->codecpar->bit_rate = (uint64_t)st->codecpar->sample_rate * (uint64_t)caf->bytes_per_packet * 8
|
|
/ (uint64_t)caf->frames_per_packet;
|
|
} else {
|
|
st->codecpar->bit_rate = 0;
|
|
}
|
|
|
|
/* determine codec */
|
|
if (st->codecpar->codec_tag == MKTAG('l','p','c','m'))
|
|
st->codecpar->codec_id = ff_mov_get_lpcm_codec_id(st->codecpar->bits_per_coded_sample, (flags ^ 0x2) | 0x4);
|
|
else
|
|
st->codecpar->codec_id = ff_codec_get_id(ff_codec_caf_tags, st->codecpar->codec_tag);
|
|
return 0;
|
|
}
|
|
|
|
/** Read magic cookie chunk */
|
|
static int read_kuki_chunk(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[0];
|
|
int ret;
|
|
|
|
if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
|
|
return -1;
|
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
|
|
/* The magic cookie format for AAC is an mp4 esds atom.
|
|
The lavc AAC decoder requires the data from the codec specific
|
|
description as extradata input. */
|
|
int strt, skip;
|
|
|
|
strt = avio_tell(pb);
|
|
ff_mov_read_esds(s, pb);
|
|
skip = size - (avio_tell(pb) - strt);
|
|
if (skip < 0 || !st->codecpar->extradata ||
|
|
st->codecpar->codec_id != AV_CODEC_ID_AAC) {
|
|
av_log(s, AV_LOG_ERROR, "invalid AAC magic cookie\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_skip(pb, skip);
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_ALAC) {
|
|
#define ALAC_PREAMBLE 12
|
|
#define ALAC_HEADER 36
|
|
#define ALAC_NEW_KUKI 24
|
|
uint8_t preamble[12];
|
|
if (size < ALAC_NEW_KUKI) {
|
|
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
|
|
avio_skip(pb, size);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (avio_read(pb, preamble, ALAC_PREAMBLE) != ALAC_PREAMBLE) {
|
|
av_log(s, AV_LOG_ERROR, "failed to read preamble\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if ((ret = ff_alloc_extradata(st->codecpar, ALAC_HEADER)) < 0)
|
|
return ret;
|
|
|
|
/* For the old style cookie, we skip 12 bytes, then read 36 bytes.
|
|
* The new style cookie only contains the last 24 bytes of what was
|
|
* 36 bytes in the old style cookie, so we fabricate the first 12 bytes
|
|
* in that case to maintain compatibility. */
|
|
if (!memcmp(&preamble[4], "frmaalac", 8)) {
|
|
if (size < ALAC_PREAMBLE + ALAC_HEADER) {
|
|
av_log(s, AV_LOG_ERROR, "invalid ALAC magic cookie\n");
|
|
av_freep(&st->codecpar->extradata);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (avio_read(pb, st->codecpar->extradata, ALAC_HEADER) != ALAC_HEADER) {
|
|
av_log(s, AV_LOG_ERROR, "failed to read kuki header\n");
|
|
av_freep(&st->codecpar->extradata);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);
|
|
} else {
|
|
AV_WB32(st->codecpar->extradata, 36);
|
|
memcpy(&st->codecpar->extradata[4], "alac", 4);
|
|
AV_WB32(&st->codecpar->extradata[8], 0);
|
|
memcpy(&st->codecpar->extradata[12], preamble, 12);
|
|
if (avio_read(pb, &st->codecpar->extradata[24], ALAC_NEW_KUKI - 12) != ALAC_NEW_KUKI - 12) {
|
|
av_log(s, AV_LOG_ERROR, "failed to read new kuki header\n");
|
|
av_freep(&st->codecpar->extradata);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_skip(pb, size - ALAC_NEW_KUKI);
|
|
}
|
|
} else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
|
|
// The data layout for Opus is currently unknown, so we do not export
|
|
// extradata at all. Multichannel streams are not supported.
|
|
if (st->codecpar->channels > 2) {
|
|
avpriv_request_sample(s, "multichannel Opus in CAF");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
avio_skip(pb, size);
|
|
} else if ((ret = ff_get_extradata(s, st->codecpar, pb, size)) < 0) {
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/** Read packet table chunk */
|
|
static int read_pakt_chunk(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[0];
|
|
CafContext *caf = s->priv_data;
|
|
int64_t pos = 0, ccount, num_packets;
|
|
int i;
|
|
|
|
ccount = avio_tell(pb);
|
|
|
|
num_packets = avio_rb64(pb);
|
|
if (num_packets < 0 || INT32_MAX / sizeof(AVIndexEntry) < num_packets)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
st->nb_frames = avio_rb64(pb); /* valid frames */
|
|
st->nb_frames += avio_rb32(pb); /* priming frames */
|
|
st->nb_frames += avio_rb32(pb); /* remainder frames */
|
|
|
|
st->duration = 0;
|
|
for (i = 0; i < num_packets; i++) {
|
|
av_add_index_entry(s->streams[0], pos, st->duration, 0, 0, AVINDEX_KEYFRAME);
|
|
pos += caf->bytes_per_packet ? caf->bytes_per_packet : ff_mp4_read_descr_len(pb);
|
|
st->duration += caf->frames_per_packet ? caf->frames_per_packet : ff_mp4_read_descr_len(pb);
|
|
}
|
|
|
|
if (avio_tell(pb) - ccount > size) {
|
|
av_log(s, AV_LOG_ERROR, "error reading packet table\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_skip(pb, ccount + size - avio_tell(pb));
|
|
|
|
caf->num_bytes = pos;
|
|
return 0;
|
|
}
|
|
|
|
/** Read information chunk */
|
|
static void read_info_chunk(AVFormatContext *s, int64_t size)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
unsigned int i;
|
|
unsigned int nb_entries = avio_rb32(pb);
|
|
for (i = 0; i < nb_entries && !avio_feof(pb); i++) {
|
|
char key[32];
|
|
char value[1024];
|
|
avio_get_str(pb, INT_MAX, key, sizeof(key));
|
|
avio_get_str(pb, INT_MAX, value, sizeof(value));
|
|
av_dict_set(&s->metadata, key, value, 0);
|
|
}
|
|
}
|
|
|
|
static int read_header(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
CafContext *caf = s->priv_data;
|
|
AVStream *st;
|
|
uint32_t tag = 0;
|
|
int found_data, ret;
|
|
int64_t size, pos;
|
|
|
|
avio_skip(pb, 8); /* magic, version, file flags */
|
|
|
|
/* audio description chunk */
|
|
if (avio_rb32(pb) != MKBETAG('d','e','s','c')) {
|
|
av_log(s, AV_LOG_ERROR, "desc chunk not present\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
size = avio_rb64(pb);
|
|
if (size != 32)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
ret = read_desc_chunk(s);
|
|
if (ret)
|
|
return ret;
|
|
st = s->streams[0];
|
|
|
|
/* parse each chunk */
|
|
found_data = 0;
|
|
while (!avio_feof(pb)) {
|
|
|
|
/* stop at data chunk if seeking is not supported or
|
|
data chunk size is unknown */
|
|
if (found_data && (caf->data_size < 0 || !(pb->seekable & AVIO_SEEKABLE_NORMAL)))
|
|
break;
|
|
|
|
tag = avio_rb32(pb);
|
|
size = avio_rb64(pb);
|
|
pos = avio_tell(pb);
|
|
if (avio_feof(pb))
|
|
break;
|
|
|
|
switch (tag) {
|
|
case MKBETAG('d','a','t','a'):
|
|
avio_skip(pb, 4); /* edit count */
|
|
caf->data_start = avio_tell(pb);
|
|
caf->data_size = size < 0 ? -1 : size - 4;
|
|
if (caf->data_size > 0 && (pb->seekable & AVIO_SEEKABLE_NORMAL))
|
|
avio_skip(pb, caf->data_size);
|
|
found_data = 1;
|
|
break;
|
|
|
|
case MKBETAG('c','h','a','n'):
|
|
if ((ret = ff_mov_read_chan(s, s->pb, st, size)) < 0)
|
|
return ret;
|
|
break;
|
|
|
|
/* magic cookie chunk */
|
|
case MKBETAG('k','u','k','i'):
|
|
if (read_kuki_chunk(s, size))
|
|
return AVERROR_INVALIDDATA;
|
|
break;
|
|
|
|
/* packet table chunk */
|
|
case MKBETAG('p','a','k','t'):
|
|
if (read_pakt_chunk(s, size))
|
|
return AVERROR_INVALIDDATA;
|
|
break;
|
|
|
|
case MKBETAG('i','n','f','o'):
|
|
read_info_chunk(s, size);
|
|
break;
|
|
|
|
default:
|
|
av_log(s, AV_LOG_WARNING,
|
|
"skipping CAF chunk: %08"PRIX32" (%s), size %"PRId64"\n",
|
|
tag, av_fourcc2str(av_bswap32(tag)), size);
|
|
case MKBETAG('f','r','e','e'):
|
|
if (size < 0 && found_data)
|
|
goto found_data;
|
|
if (size < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
break;
|
|
}
|
|
|
|
if (size > 0) {
|
|
if (pos > INT64_MAX - size)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, FFMAX(0, pos + size - avio_tell(pb)));
|
|
}
|
|
}
|
|
|
|
if (!found_data)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
found_data:
|
|
if (caf->bytes_per_packet > 0 && caf->frames_per_packet > 0) {
|
|
if (caf->data_size > 0)
|
|
st->nb_frames = (caf->data_size / caf->bytes_per_packet) * caf->frames_per_packet;
|
|
} else if (st->nb_index_entries && st->duration > 0) {
|
|
if (st->codecpar->sample_rate && caf->data_size / st->duration > INT64_MAX / st->codecpar->sample_rate / 8) {
|
|
av_log(s, AV_LOG_ERROR, "Overflow during bit rate calculation %d * 8 * %"PRId64"\n",
|
|
st->codecpar->sample_rate, caf->data_size / st->duration);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
st->codecpar->bit_rate = st->codecpar->sample_rate * 8LL *
|
|
(caf->data_size / st->duration);
|
|
} else {
|
|
av_log(s, AV_LOG_ERROR, "Missing packet table. It is required when "
|
|
"block size or frame size are variable.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
st->start_time = 0;
|
|
|
|
/* position the stream at the start of data */
|
|
if (caf->data_size >= 0)
|
|
avio_seek(pb, caf->data_start, SEEK_SET);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define CAF_MAX_PKT_SIZE 4096
|
|
|
|
static int read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = s->streams[0];
|
|
CafContext *caf = s->priv_data;
|
|
int res, pkt_size = 0, pkt_frames = 0;
|
|
int64_t left = CAF_MAX_PKT_SIZE;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
/* don't read past end of data chunk */
|
|
if (caf->data_size > 0) {
|
|
left = (caf->data_start + caf->data_size) - avio_tell(pb);
|
|
if (!left)
|
|
return AVERROR_EOF;
|
|
if (left < 0)
|
|
return AVERROR(EIO);
|
|
}
|
|
|
|
pkt_frames = caf->frames_per_packet;
|
|
pkt_size = caf->bytes_per_packet;
|
|
|
|
if (pkt_size > 0 && pkt_frames == 1) {
|
|
pkt_size = (CAF_MAX_PKT_SIZE / pkt_size) * pkt_size;
|
|
pkt_size = FFMIN(pkt_size, left);
|
|
pkt_frames = pkt_size / caf->bytes_per_packet;
|
|
} else if (st->nb_index_entries) {
|
|
if (caf->packet_cnt < st->nb_index_entries - 1) {
|
|
pkt_size = st->index_entries[caf->packet_cnt + 1].pos - st->index_entries[caf->packet_cnt].pos;
|
|
pkt_frames = st->index_entries[caf->packet_cnt + 1].timestamp - st->index_entries[caf->packet_cnt].timestamp;
|
|
} else if (caf->packet_cnt == st->nb_index_entries - 1) {
|
|
pkt_size = caf->num_bytes - st->index_entries[caf->packet_cnt].pos;
|
|
pkt_frames = st->duration - st->index_entries[caf->packet_cnt].timestamp;
|
|
} else {
|
|
return AVERROR(EIO);
|
|
}
|
|
}
|
|
|
|
if (pkt_size == 0 || pkt_frames == 0 || pkt_size > left)
|
|
return AVERROR(EIO);
|
|
|
|
res = av_get_packet(pb, pkt, pkt_size);
|
|
if (res < 0)
|
|
return res;
|
|
|
|
pkt->size = res;
|
|
pkt->stream_index = 0;
|
|
pkt->dts = pkt->pts = caf->frame_cnt;
|
|
|
|
caf->packet_cnt++;
|
|
caf->frame_cnt += pkt_frames;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
AVStream *st = s->streams[0];
|
|
CafContext *caf = s->priv_data;
|
|
int64_t pos, packet_cnt, frame_cnt;
|
|
|
|
timestamp = FFMAX(timestamp, 0);
|
|
|
|
if (caf->frames_per_packet > 0 && caf->bytes_per_packet > 0) {
|
|
/* calculate new byte position based on target frame position */
|
|
pos = caf->bytes_per_packet * (timestamp / caf->frames_per_packet);
|
|
if (caf->data_size > 0)
|
|
pos = FFMIN(pos, caf->data_size);
|
|
packet_cnt = pos / caf->bytes_per_packet;
|
|
frame_cnt = caf->frames_per_packet * packet_cnt;
|
|
} else if (st->nb_index_entries) {
|
|
packet_cnt = av_index_search_timestamp(st, timestamp, flags);
|
|
frame_cnt = st->index_entries[packet_cnt].timestamp;
|
|
pos = st->index_entries[packet_cnt].pos;
|
|
} else {
|
|
return -1;
|
|
}
|
|
|
|
if (avio_seek(s->pb, pos + caf->data_start, SEEK_SET) < 0)
|
|
return -1;
|
|
|
|
caf->packet_cnt = packet_cnt;
|
|
caf->frame_cnt = frame_cnt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_caf_demuxer = {
|
|
.name = "caf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
|
|
.priv_data_size = sizeof(CafContext),
|
|
.read_probe = probe,
|
|
.read_header = read_header,
|
|
.read_packet = read_packet,
|
|
.read_seek = read_seek,
|
|
.codec_tag = (const AVCodecTag* const []){ ff_codec_caf_tags, 0 },
|
|
};
|